Grate.



P. P. GREDELL.

GRATB.

AIPLIOATION FILED MAY 8, 1914.

1,1 12,999, Patented Oct. 6, 1914.

PaulfiGrede/l,

Inventor by I o Attorneys 7 the main burner.

lhe invention aims, primarily, to provide a novel form of secondary grate of the type. 15.

i so

PAUL P. GREDELL, 0F QUINCY, ILLINOIS.

GRATE.

Application filed May 8, 1914. Serial No. 837,241.

To all whom it may concern Be it known that I, PAUL P. GREDELL, a citizen of the United States, residing at Quincy, in the county of Adams and State of Illinois, have invented a new and useful Grate, of which the following is a specification. r

The device forming the subject matter of this application is an auxiliary or secondary grate, adapted to beplaced above grate of a stove, furnace or other above mentioned, which secondary grate may without difficulty be set in a furnace or stove and, with equal facility be taken down, the construction being such that any one of the bars which go to make up the secondary grate may be renewed readily.

It is within the scope of the invention to improve generally and to enhance the utility ofdevices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed it being understood that changes in the precise embodiment of the invention herein disclosed can be made withi in the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawing:Figure 1 shows in vertical transverse section, a device constructed in accordance with the present invention; Fig. Qis a bottom plan of one of the grate bars; Fig. 3 is a side elevation of one of the grate bars; Fig 1is a top plan of one of the grate bars; Fig. 5 is a fragmental longitudinal section of the ring or support on which the grate bars are mounted; Fig. 6 is a side elevation of one of the legs which, being assembled with the support, constitute means whereby the secondary grate is upheld.

In the accompanying drawings, the numeral 1 indicates the fire pot of a furnace, the word furnace beingusecl to designate any structure with which the device forming the subject matterof this application is adapted to be assembled. The fire pot 1, ordinarily, is provided adjacent its lower end with an inwardly projecting ledge 2.

Specification of Letters Patent.

Patented The main grate, which may be of any desired form, is denoted by the numeral 3.

The dcviceiiforming thesubject matter of the present application is a secondary grate, adapted to be disposed in the fire pot 1 above the main grate 3. In the form of the invention under discussion, there is provlded an annular support l, preferably in the form of a ring, the support 4 being made of a-bar of metal, the ends of which may. be ignited, as shown in Fig. 5, by means of a securing strip 9 held in place by rivets 10, although any other construction may be employed at this point if deemed expedient. The support 4: is upheld on a plurality of legs 5, four legs ordinarily being employed. Each leg 5; is equipped adjacent its upper end with an enlarged boss 6 having an opening 7 receiving the support 4. Preferably, the support 1 is of rectangular cross section and'the openings 7 are shaped accordingly, so that the legs 5 will not rotateon the sup port 4:. 1 i

In carrying out the invention there is provided a plurality. of bars 11, each bar 11 comprising a body portion 12at the upper end of which is formed a laterally inclined arm 14, the lower end of the body 12 terminatingin a tongue 15 which is inclined with respect to the body 12 as Fig.1?) will clearly show. .On the rear edge of the body portion 12 of each bar 11 adjacent the point of juncture between the body 12 and the tongue 15 there formed a boss 16in the lower edge of which is fashioned a down wardly openingnotch 17 defining a finger 18. Each bar 11 is provided adjacent its upper end and at one side with a spacing lug 19 and above the spacing lug19 but. upon the opposite side of the bar therefrom is formed a spacing lug 20. The lower edge of the spacing lug 20 is in approximate alinement with the upper edge of the spacing lug 19. Adjacent its lower edge, each bar 11 is provided with a laterally extended spacing lug 21, extended in the same direction as the lug 20.

In practical operation, the notches 17 in the bars 11 receive thesupport 4, the bars slanting outwardly to form an inverted, frusto-conical grate, and the upper arms 14 of the barsbeing received by the fire pot 1, as Fig. l-will clearly show.

Noting particularly Fig. 1, it will be noted that the fingers 19 and 20 on the re-.

spective bars cooperate to form a double width ring adjacent the top of the grate, the lugs 21 cooperating to form a single width ring adjacent the bottom of the crate.

One of the main advantages incident to the present invention is that the structure may be assembled readily in the fire pot 1, and with equal facility be taken down, it being possible to remove without difficulty, any one of the bars 11 which may have become burned out or damaged. Owing to the construction of the device as above outlined, it will be observed the secondary grate device may be made readily in a fire box, although the safiie may have become slightly warped. 4,

The secondary grate allows a fr ee circulation of air and it does not permit the accumulation'of"clinkers. The fuel does not become clogged, the fuel consumption is lessened, smoke and gases will be reftdily consumed, and the fire will burn more evenly, whenthe secondary grate above described is used,

Having thus described the invention, what is claimed is :--I

1. In a device of the class described, an

annular support; and outwardly inclined upwardly extended bars assembled with the support to form an inverted frusto-c'onical grate, each bar being provided with oppositely extended spacing lugs upon its edges, the upper edge of one lug on each bar being alined with the lower edge of the other lug on the same bar, whereby the respective lugs on adjoining bars will cobperateto form a double width ring adjacent the top of the grate.

'2. In a device 01": the class described, an

annular support; and outwardly inclined upwardly extended bars assembled with the support to form an inverted frusto-conical grate, each bar being provided with oppositely extended spacing lugs upon its edges, the upper edge of one lug on each bar being alined with the lower edge of the other lug on the same bar, whereby the respective lugs on adjoining bars will cooperate to form a double width ring adjacent the top of the grate, each bar being provided near its lower end with a single spacing lug, the single lugs cooperating to form a single width ring about the grate adjacent the lower end of the grate. v

3. In a device of the class described, a fire pot; an annular support; legs between which the support passes, the legs engaging the fire pot; a plurality of outwardly slanting upwardly extended bars, each bar being provided adjacent its lower end in its outer edge with a downwardly opening notch which receives the support, the upper ends of the bars resting against the fire pot, and the bars cooperating to form aninverted, frusto-conical grate, each bar being provided with oppositely extended spaced lugs upon its edges, the upper edge of one lug Witnesses:

BERNARD I-I. WVILBER, HENRY DITTMER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington. D. C.

PAUL P. GREDELL. 

